@-webkit-keyframes spin {
    0% {
      transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */
    }
    100% {
      transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */
    }
  }
  
  @-moz-keyframes spin {
    0% {
      -moz-transform: rotate(0deg); /* Firefox 16+*/
    }
    100% {
      -moz-transform: rotate(360deg); /* Firefox 16+*/
    }
  }
  
  @keyframes spin {
    0% {
      transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */
    }
    100% {
      transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */
    }
  }
  
  #preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1003;
    background: #000000;
    & > div {
      display: block;
      position: relative;
      left: 50%;
      top: 50%;
      width: 150px;
      height: 150px;
      margin: -75px 0 0 -75px;
      border-radius: 50%;
      border: 3px solid transparent;
      border-top-color: $danger;
      transform: translate3d(0, 0, 0);
      animation: spin 2s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
      &:before {
        content: "";
        position: absolute;
        top: 5px;
        left: 5px;
        right: 5px;
        bottom: 5px;
        border-radius: 50%;
        border: 3px solid transparent;
        border-top-color: $primary;
        -webkit-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
        animation: spin 3s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
      }
      &:after {
        content: "";
        position: absolute;
        top: 15px;
        left: 15px;
        right: 15px;
        bottom: 15px;
        border-radius: 50%;
        border: 3px solid transparent;
        border-top-color: $warning;
        animation: spin 1.5s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
      }
    }
  }
  